KPMI Cast Iron +0.001 Exhaust Valve Guide - Harley Panhead & Shovelhead 1948-1977
About KPMI
Kibblewhite Precision Machining supplies valves, valve springs, guides and complete top-end kits used by professional V-twin engine builders. Its black diamond valves and spring kits are a standard specification on high-lift cam builds.
This KPMI cast iron exhaust valve guide features a +0.001 inch oversize bore, specifically designed for rebuilding Harley Panhead (1948-1965) and Shovelhead (1966-1977) engines. It's a direct replacement that addresses excessive wear in the cylinder head's valve guide bore, restoring proper valve stem clearance and sealing. This oversize guide is crucial for a precision top-end rebuild on these classic Big Twins.
Why riders pick this
- Cast iron construction for durability
- +0.001 inch oversize bore
- For Harley Panhead (1948-1965) & Shovelhead (1966-1977)
- Designed for exhaust valve position
- Restores valve sealing and reduces oil burning
When performing a comprehensive top-end rebuild on your vintage Harley Panhead or Shovelhead, addressing worn valve guides is paramount. This KPMI cast iron exhaust valve guide with a +0.001 inch oversize bore allows you to effectively restore cylinder heads that have experienced significant wear, ensuring proper valve stem clearance and optimal valve sealing. Correct valve guide fitment is essential for preventing oil consumption, maintaining consistent compression, and maximizing the overall performance and longevity of your engine. The durable cast iron construction provides reliable, long-lasting service.
Precision Fit for Worn Cylinder Heads
- Durable cast iron construction for lasting performance
- +0.001 inch oversize bore for addressing wear
- Designed for exhaust valve position
- Direct fit for Harley Panhead (1948-1965) and Shovelhead (1966-1977)
The Right Solution for a Solid Rebuild
Opting for an oversize valve guide like this KPMI component is often necessary when the original cylinder head's guide bore has expanded due to wear. This allows your engine builder to machine the head to accept the new, larger guide, creating a fresh, precise fit. Valve guide replacement requires professional installation, including precise pressing and final reaming, to achieve the correct valve stem clearance. This ensures your Panhead or Shovelhead engine runs strong and reliably for many more miles, making it an indispensable part of a quality engine overhaul.
Specifications
- Brand: KPMI
- Manufacturer Part #: 20-2031C
- Type: Exhaust Valve Guide
- Material: Cast iron
- Bore Size: +0.001 in oversize
- Length: 1.05 in
- Weight: 0.07 lbs
Common questions
What is the purpose of a +0.001 oversize valve guide?
A +0.001 inch oversize valve guide is used when the cylinder head's original guide bore is worn beyond a standard size, or if you are using an oversize valve stem due to wear. It allows for precision machining to achieve the correct valve-to-guide clearance.
Is this for intake or exhaust valves?
This KPMI guide is specifically for the exhaust valve position. Intake valve guides have different specifications and are a separate part.
Does installation require machine work?
Yes, proper installation of this valve guide requires removing the cylinder head, pressing out the old guide, pressing in the new guide, and then reaming the new guide to the final valve stem clearance. This work is best performed by a professional machine shop.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | KPMI |
| TYPE | Engine |
| SKU | 191-57018C |
| WEIGHT | 0.07 lb |
